[Bug uprobes/13489] support upstream inode-based uprobes

[jistone at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13489

--- Comment #2 from Josh Stone <jistone at redhat dot com> 2011-12-09 23:42:35 UTC ---
Created attachment 6101
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6101
prototype support for sdt semaphores

This adds process/mmap tracking with David Smith's new task_finder2
implementation, so we can increment and decrement semaphores for SDT probes. 
This seems to work on F16, but shows warnings when running on rawhide.  It
seems that callbacks in this new task_finder are not allowed to sleep, which
makes the get/put_user problematic.  I'm not sure how to make progress on this
without finding a sleepy context.

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